Tank.



1-. D. ROBERTS.

TANK. APPLICATION FILED MAR. 20. 911.

Patented Sept. 3,1918.

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7 To 7mm, may 6071.667'71. I aB i know that 'L'JOHN DJRoBEn'rs, a

citizen of the United 'States, r'esidingat St Paul. inthe county p Minnesota; have invented new and useful of Ramsey and" State of Improvement in Tanks,- whichjtheffollowingis a" specification.

This'inve'nt1oh relates to that class of tanl ris,"which isgenera'lly' although not'necplicated and the parts collectscaleand sedi ess'arily} employed for heating water by steain 'or otherheating medium, the primary 7 object being to provide simple and durable tankTwhich is inexpensive in construction and effective 1 in use.

With tanks of this character the construction "is usually comnent, which'isvery diflicult-to remove and which 'rnderstlie tank unefiicient and jobj ectionable, the tank itself soon'deterior'ating and leaking. By the use offmy inventlon these objections aref 'si ibstantially overcome, th t'ank beingexti'einely simple in construc- ;1;ti, nyand reducingto, a m nim the mtion of scale and the collecting of sediment therein. f

In the accompanying drawing forming part of this specification, Figure 1 is a longitudinal section of my invention, and Fig. 2 is a section taken on the line XX of Fig. 1. V

In constructing my invention two cylindrical shells 2 and 3 are employed, the former being of largerdiameter than the lat ter and said shells being concentrically arranged one within the other and spaced a short distance apart to produce a jacketing 7 space between them. At one end of the tank structure are two domes or convex shells 4. and 5, which are likewise concentrically arranged, the arc of the inner shell being of less diameter than that of the outer shell and said convex shells being also spaced apart to form a continuation of the jacketing space between the cylindrical shells. The edge of the convex shell 5 is secured in the inner edge of one end of the shell 3 by rivets 6 or other suitable means and the edge of the convex shell 4: is secured in the corresponding end of the cylindrical shell 2 by rivets 7 or other suitable means. The opposite ends of the cylindrical shells to those which are provided with the convex shell members 4 and 5 are supported in spaced parallel relation upon the solid ring8, which closes the space at the end of the tank structure at one of the ends between the shell memoint.

TANK;

-bers2 and 3 and'a concave ShelLmemberQ. is

secured at its edgerwhichisformetb-With a flange *10 to frtl'i'e -inner edge of the ccorresponding 'end oftheshellinember 3 by m-ea'ns of rivets 1 1) or other suitable means which also secure the's'hel'ls 2 and 3:fa1id"ring 8 tightly together to prodricei a leak A proof The concave shell-member closes the: end

ofth'e' inner shell 3 opp'ositeithat' which is provided with the convex shell member 5. In this mannera "hot 'water chamber A is formed by"the 'cylindri'cal sliell'. .1nember 3 and "inner endinemberst and' 9'and an outer jacket sp'ace'B is provided: surrounding the hotwater chamber.- The ends of: the'cylindrical members 2 and 3' are held in spaced relation ad oinmg the convex-members L and?) bymeans'of sector-s12 made of angle members secured to one Of" the' c ylindrical shell members by rivets '13 or 'other suitable means, said sectors being spaced" apart between their ends, so that steam or other heating medium may circula.te freely from "oneslde to the other.

WVater to be heated is admitted into the lower portion of the hot water chamber A through a pipe or duct 14 which passes. through the outer shell 2 and is threaded or otherwise secured to the inner shell, a

gland 15 being provided in the outer shell Y surrounding said duct to produce a tight joint. The water which is admitted after being heated is conducted from the water chamber A by the pipe or duct 16, which likewise passes through the outer shell 2 and is threaded in the inner shell, a gland 17 being provided on said outer shell through which said duct passes and by which a tight joint is produced. This outlet duct is preferably arranged at a distance from the inlet duct 14; and leading from the upper portion of the water chamber A. Disposed longitudinally in the water chamber and interposed between the ducts 14 and 16 is a baffle 18,

which as illustrated is a wall or plate curved downwardly between its side edges and secured to the walls of theinner shell 3 and concave shell 9 by rivets 19 or other suitable means. a

Live steam is admitted into the steam jacket space by means of one or more steam pipesor ducts 21, which are tapped into the outershell 2 near the upper portion of the jacket space. After circulating through the steam jacket space, the steam and water of condensation is conducted away by the egress duct 20 in the outer casing. As a result of this structure, a large heat radiating surface is provided for heating the body of water in the tank, said surface being smooth in contour and being free of a large number of sharp bends and turns, which would naturally tend to collect scale and sediment. The structure shown is adapted particularly for horizontal use, but the arrangement of the parts may be easily adapted for use when the cylindrical shell members are placed in vertical instead of horizontal position.

The inner central portion of the concave shell 'member 9 is shown provided with a clean out door or stopper 22 of usual construction which can easily be removed when it is desired to gain access into the water chamber A.

In accordance with the patent statutes 1 have described the principles of operation of my invention together with the apparatus which I now consider to represent the best embodiment thereof, but I desire to have it understood that the construction shown is only illustrative, and that the invention can. be carried out by other means and applied to uses other than those above set forth within the scope of the following claim.

Having described my invention what I claim as new and desire to protect by Letters Patent is A tank, comprising, in combination, a pair of outer and inner cylindrical shells spaced apart to assist in producing an outer heating medium jacket space and an inner liquid holding chamber inner and outer end members spaced apart and secured to said cylindrical member to form a continuation of said jacket space near one end of said structure, a spacing ring interposed between t-he ends of said cylindrical shells near the opposite end of said structure from said end men1- bers, a single end shell' in the inner shell member having its edge disposed within said ring, means for securing said cylindrical and single shells and ring together, said jacket space being provided with ingress and egress heating medium ports, and said liquid holding chamber having ingress and egress ports, a baffle in said inner shell disposed between the liquid holding chamber ingress and egress ports, and spacing means interposed between said outer and inner cylindrical shell. formed with openings for the heating medium circulating through said jacket space.

In testimony whereof, I have signed my name to this specification.

JOHN D. ROBERTS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. E. 

